Experiment method for testing permeability of rough fracture rock

A technique for permeability performance and fractured rock mass, applied in the fields of permeability/surface area analysis, measuring device, suspension and porous material analysis, etc. Inaccurate and other problems, to achieve the effect of convenient measurement, accurate and reliable measurement results, and convenient operation

Inactive Publication Date: 2016-06-29
BEIJING RES INST OF URANIUM GEOLOGY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is: the test method for testing the permeability of rough fractured rock mass in the prior art uses inclusion measurement, and the permeability only reflects the permeability of the fractured rock mass in the cavity, and cannot directly reflect the permeability of the fractured rock mass. The permeability of the fractured rock mass itself, the test results are inaccurate, which directly affects the scientificity of the practical application of the measurement results

Method used

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  • Experiment method for testing permeability of rough fracture rock
  • Experiment method for testing permeability of rough fracture rock

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Embodiment 1

[0027] Such as figure 1 , figure 2 As shown, a kind of test method that is used for the permeability test of rough fractured rock mass in the present embodiment comprises the following steps:

[0028] Step 1. Device Layout

[0029] The rock mass to be tested is divided into upper and lower parts, and the upper rock mass 1 and the lower rock mass 2 are stacked up and down.

[0030] The upper rock mass 1 is provided with several through holes, some of which are water flow injection channels, and the rest of the through holes are water flow outflow channels.

[0031] The upper surface of the lower rock mass 2 includes a contact area and a test concave area 5, the test concave area 5 is surrounded by the contact area, and the height of the test concave area 5 is lower than that of the contact area in the horizontal direction. The surface of the test concave area 5 is subjected to digging operations such as excavation and grooving to form a rock rough surface 4 with a certain r...

Embodiment 2

[0036] The difference between this embodiment and embodiment 1 is:

[0037] In step 2, a sealing device such as a sealing ring is provided on the lower surface of the upper rock mass 1 or the upper surface of the lower rock mass 2 to ensure that the water flow area 3 of the lower rock mass is inside the test concave area 5 .

Embodiment 3

[0039] The difference between this embodiment and the above two embodiments is:

[0040] In step 2, a water pressure control device is used to ensure that the water flowing through the lower rock mass area 3 is inside the test concave area 5 .

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Abstract

The invention belongs to the technical field of fracture medium permeability testing, and particularly relates to an experiment method for testing permeability of rough fracture rock. The experiment method includes following steps: piling upper rock and lower rock in an up-down manner; forming a plurality of through holes in the upper rock, wherein the upper surface of the lower rock comprises a contact area and an experiment concave area which is surrounded by the contact area, an upper experiment concave area is lower than the contact area horizontally, the surface of the experiment concave area is a rock rough surface with certain roughness, and positions of the through holes of the upper rock are all within a range corresponding to the experiment concave area of the lower rock; enabling water flow to flow into the experiment concave area of the lower rock through the through holes of the upper rock to form a water flow passing area and to flow out of the upper rock from the inside of the experiment concave area; adopting a flow monitor and a water pressure sensor to acquire permeation experiment parameters. By using the experiment method, the technical problem that existing methods are inaccurate in testing result is solved, and accurate measuring of rough surface permeability of fracture rock can be realized.

Description

technical field [0001] The invention belongs to the technical field of fracture medium permeability test, in particular to a test method for rough fracture rock mass permeability test. Background technique [0002] The permeability characteristic of the medium is the basic mechanical property of the medium. Seepage research belongs to the research category of basic mechanical properties of fractured media, and it plays a fundamental guiding role in the study of media seepage characteristics under different working conditions. For quasi-brittle rock materials with fractures, the permeability is an important factor to determine the long-term safety of engineering rock mass. The permeability parameters for evaluating the long-term stability of engineering rock mass are obtained through the permeability test of fractured rock mass, especially the permeability performance of natural rough fractured rock mass surface, which is of vital significance for the study of the permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 满轲苏锐王驹陈亮宗自华王锡勇董建楠李鹤飞
Owner BEIJING RES INST OF URANIUM GEOLOGY
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